Scaling Web Apps With RabbitMQ Álvaro Videla The NetCircle Erlang Factory Lite 2010
Who?
About Me Development Manager at TheNetCircle.com Writing RabbitMQ in Action for Manning Blog: http://videlalvaro.github.com/ Twitter: @old_sound
Why Do I need RabbitMQ?
The User
I don t want to wait till your app resizes my image!
The Product Owner
Can we also notify the user friends when she uploads a new image?
Can we also notify the user friends when she uploads a new image? I forgot to mention we need it for tomorrow
The Sysadmin
Dumb! You re delivering full size images! The bandwidth bill has tripled!
Dumb! You re delivering full size images! The bandwidth bill has tripled! We need this fixed for yesterday!
The Developer in the other team
I need to call your PHP stuff but from Python
I need to call your PHP stuff but from Python And also Java starting next week
You
FML!
Is there a solution?
RabbitMQ & AMQP
AMQP
AMQP Advanced Message Queuing Protocol Suits Interoperability Completely Open Protocol Binary Protocol AMQP Model AMQP Wire Format
AMQP Model Exchanges Message Queues Bindings Rules for binding them
AMQP Wire Protocol Functional Layer Transport Layer
Message Flow http://www.redhat.com/docs/en-us/red_hat_enterprise_mrg/1.0/html/messaging_tutorial/chap-messaging_tutorial-initial_concepts.html
Exchange Types Fanout Direct Topic
http://www.redhat.com/docs/en-us/red_hat_enterprise_mrg/1.0/html/messaging_tutorial/sect-messaging_tutorial-initial_concepts- Fanout_Exchange.html
http://www.redhat.com/docs/en-us/red_hat_enterprise_mrg/1.0/html/messaging_tutorial/sect-messaging_tutorial-initial_concepts- Direct_Exchange.html
http://www.redhat.com/docs/en-us/red_hat_enterprise_mrg/1.0/html/messaging_tutorial/sect-messaging_tutorial-initial_concepts- Topic_Exchange.html
Usage Scenarios
Usage Scenarios Batch Processing
Usage Scenarios Batch Processing Image Uploading
Usage Scenarios Batch Processing Image Uploading Distributed Logging
Scenario Batch Processing
Requirements
Requirements Generate XML
Requirements Generate XML Distribution Over a Cluster
Requirements Generate XML Distribution Over a Cluster Elasticity - Add/Remove new workers
Requirements Generate XML Distribution Over a Cluster Elasticity - Add/Remove new workers No Code Changes
Design
Publisher Code $conn = new AMQPConnection(HOST, PORT, USER, PASS, VHOST); $channel = $conn->channel(); $channel->exchange_declare('video-desc-ex', 'direct', false, true, false); $msg = new AMQPMessage($video_info, array('content_type' => 'text/plain', 'delivery_mode' => 2)); $channel->basic_publish($msg, 'video-desc-ex'); $channel->close(); $conn->close();
Publisher Code $conn = new AMQPConnection(HOST, PORT, USER, PASS, VHOST); $channel = $conn->channel(); $channel->exchange_declare('video-desc-ex', 'direct', false, true, false); $msg = new AMQPMessage($video_info, array('content_type' => 'text/plain', 'delivery_mode' => 2)); $channel->basic_publish($msg, 'video-desc-ex'); $channel->close(); $conn->close();
Publisher Code $conn = new AMQPConnection(HOST, PORT, USER, PASS, VHOST); $channel = $conn->channel(); $channel->exchange_declare('video-desc-ex', 'direct', false, true, false); $msg = new AMQPMessage($video_info, array('content_type' => 'text/plain', 'delivery_mode' => 2)); $channel->basic_publish($msg, 'video-desc-ex'); $channel->close(); $conn->close();
Publisher Code $conn = new AMQPConnection(HOST, PORT, USER, PASS, VHOST); $channel = $conn->channel(); $channel->exchange_declare('video-desc-ex', 'direct', false, true, false); $msg = new AMQPMessage($video_info, array('content_type' => 'text/plain', 'delivery_mode' => 2)); $channel->basic_publish($msg, 'video-desc-ex'); $channel->close(); $conn->close();
Publisher Code $conn = new AMQPConnection(HOST, PORT, USER, PASS, VHOST); $channel = $conn->channel(); $channel->exchange_declare('video-desc-ex', 'direct', false, true, false); $msg = new AMQPMessage($video_info, array('content_type' => 'text/plain', 'delivery_mode' => 2)); $channel->basic_publish($msg, 'video-desc-ex'); $channel->close(); $conn->close();
Publisher Code $conn = new AMQPConnection(HOST, PORT, USER, PASS, VHOST); $channel = $conn->channel(); $channel->exchange_declare('video-desc-ex', 'direct', false, true, false); $msg = new AMQPMessage($video_info, array('content_type' => 'text/plain', 'delivery_mode' => 2)); $channel->basic_publish($msg, 'video-desc-ex'); $channel->close(); $conn->close();
Consumer Code $conn = new AMQPConnection(HOST, PORT, USER, PASS, VHOST); $channel = $conn->channel(); $channel->exchange_declare('video-desc-ex', 'direct', false, true, false); $channel->queue_declare('video-desc-queue', false, true, false, false); $channel->queue_bind('video-desc-queue', 'video-desc-ex'); $channel->basic_consume('video-desc-queue', $consumer_tag, false, false, false, false, $consumer); while(count($channel->callbacks)) { $channel->wait(); }
Consumer Code $conn = new AMQPConnection(HOST, PORT, USER, PASS, VHOST); $channel = $conn->channel(); $channel->exchange_declare('video-desc-ex', 'direct', false, true, false); $channel->queue_declare('video-desc-queue', false, true, false, false); $channel->queue_bind('video-desc-queue', 'video-desc-ex'); $channel->basic_consume('video-desc-queue', $consumer_tag, false, false, false, false, $consumer); while(count($channel->callbacks)) { $channel->wait(); }
Consumer Code $conn = new AMQPConnection(HOST, PORT, USER, PASS, VHOST); $channel = $conn->channel(); $channel->exchange_declare('video-desc-ex', 'direct', false, true, false); $channel->queue_declare('video-desc-queue', false, true, false, false); $channel->queue_bind('video-desc-queue', 'video-desc-ex'); $channel->basic_consume('video-desc-queue', $consumer_tag, false, false, false, false, $consumer); while(count($channel->callbacks)) { $channel->wait(); }
Consumer Code $conn = new AMQPConnection(HOST, PORT, USER, PASS, VHOST); $channel = $conn->channel(); $channel->exchange_declare('video-desc-ex', 'direct', false, true, false); $channel->queue_declare('video-desc-queue', false, true, false, false); $channel->queue_bind('video-desc-queue', 'video-desc-ex'); $channel->basic_consume('video-desc-queue', $consumer_tag, false, false, false, false, $consumer); while(count($channel->callbacks)) { $channel->wait(); }
Consumer Code $conn = new AMQPConnection(HOST, PORT, USER, PASS, VHOST); $channel = $conn->channel(); $channel->exchange_declare('video-desc-ex', 'direct', false, true, false); $channel->queue_declare('video-desc-queue', false, true, false, false); $channel->queue_bind('video-desc-queue', 'video-desc-ex'); $channel->basic_consume('video-desc-queue', $consumer_tag, false, false, false, false, $consumer); while(count($channel->callbacks)) { $channel->wait(); }
Consumer Code $conn = new AMQPConnection(HOST, PORT, USER, PASS, VHOST); $channel = $conn->channel(); $channel->exchange_declare('video-desc-ex', 'direct', false, true, false); $channel->queue_declare('video-desc-queue', false, true, false, false); $channel->queue_bind('video-desc-queue', 'video-desc-ex'); $channel->basic_consume('video-desc-queue', $consumer_tag, false, false, false, false, $consumer); while(count($channel->callbacks)) { $channel->wait(); }
Consumer Code $conn = new AMQPConnection(HOST, PORT, USER, PASS, VHOST); $channel = $conn->channel(); $channel->exchange_declare('video-desc-ex', 'direct', false, true, false); $channel->queue_declare('video-desc-queue', false, true, false, false); $channel->queue_bind('video-desc-queue', 'video-desc-ex'); $channel->basic_consume('video-desc-queue', $consumer_tag, false, false, false, false, $consumer); while(count($channel->callbacks)) { $channel->wait(); }
Scenario Upload Pictures
Requirements
Requirements Upload Picture
Requirements Upload Picture Reward User
Requirements Upload Picture Reward User Notify User Friends
Requirements Upload Picture Reward User Notify User Friends Resize Picture
Requirements Upload Picture Reward User Notify User Friends Resize Picture No Code Changes
Design
Design
Design
Publisher Code $channel->exchange_declare('upload-pictures', 'fanout', false, true, false); $metadata = json_encode(array( 'image_id' => $image_id, 'user_id' => $user_id, image_path' => $image_path)); $msg = new AMQPMessage($metadata, array('content_type' => 'application/json', 'delivery_mode' => 2)); $channel->basic_publish($msg, 'upload-pictures');
Publisher Code $channel->exchange_declare('upload-pictures', 'fanout', false, true, false); $metadata = json_encode(array( 'image_id' => $image_id, 'user_id' => $user_id, image_path' => $image_path)); $msg = new AMQPMessage($metadata, array('content_type' => 'application/json', 'delivery_mode' => 2)); $channel->basic_publish($msg, 'upload-pictures');
Publisher Code $channel->exchange_declare('upload-pictures', 'fanout', false, true, false); $metadata = json_encode(array( 'image_id' => $image_id, 'user_id' => $user_id, image_path' => $image_path)); $msg = new AMQPMessage($metadata, array('content_type' => 'application/json', 'delivery_mode' => 2)); $channel->basic_publish($msg, 'upload-pictures');
Publisher Code $channel->exchange_declare('upload-pictures', 'fanout', false, true, false); $metadata = json_encode(array( 'image_id' => $image_id, 'user_id' => $user_id, image_path' => $image_path)); $msg = new AMQPMessage($metadata, array('content_type' => 'application/json', 'delivery_mode' => 2)); $channel->basic_publish($msg, 'upload-pictures');
Publisher Code $channel->exchange_declare('upload-pictures', 'fanout', false, true, false); $metadata = json_encode(array( 'image_id' => $image_id, 'user_id' => $user_id, image_path' => $image_path)); $msg = new AMQPMessage($metadata, array('content_type' => 'application/json', 'delivery_mode' => 2)); $channel->basic_publish($msg, 'upload-pictures');
Consumer Code $channel->exchange_declare('upload-pictures', 'fanout', false, true, false); $channel->queue_declare('resize-picture', false, true, false, false); $channel->queue_bind('resize-picture', 'upload-pictures'); $channel->basic_consume('resize-picture', $consumer_tag, false, false, false, false, $consumer); while(count($channel->callbacks)) { $channel->wait(); }
Consumer Code $channel->exchange_declare('upload-pictures', 'fanout', false, true, false); $channel->queue_declare('resize-picture', false, true, false, false); $channel->queue_bind('resize-picture', 'upload-pictures'); $channel->basic_consume('resize-picture', $consumer_tag, false, false, false, false, $consumer); while(count($channel->callbacks)) { $channel->wait(); }
Consumer Code $channel->exchange_declare('upload-pictures', 'fanout', false, true, false); $channel->queue_declare('resize-picture', false, true, false, false); $channel->queue_bind('resize-picture', 'upload-pictures'); $channel->basic_consume('resize-picture', $consumer_tag, false, false, false, false, $consumer); while(count($channel->callbacks)) { $channel->wait(); }
Consumer Code $channel->exchange_declare('upload-pictures', 'fanout', false, true, false); $channel->queue_declare('resize-picture', false, true, false, false); $channel->queue_bind('resize-picture', 'upload-pictures'); $channel->basic_consume('resize-picture', $consumer_tag, false, false, false, false, $consumer); while(count($channel->callbacks)) { $channel->wait(); }
Consumer Code $channel->exchange_declare('upload-pictures', 'fanout', false, true, false); $channel->queue_declare('resize-picture', false, true, false, false); $channel->queue_bind('resize-picture', 'upload-pictures'); $channel->basic_consume('resize-picture', $consumer_tag, false, false, false, false, $consumer); while(count($channel->callbacks)) { $channel->wait(); }
Consumer Code $channel->exchange_declare('upload-pictures', 'fanout', false, true, false); $channel->queue_declare('resize-picture', false, true, false, false); $channel->queue_bind('resize-picture', 'upload-pictures'); $channel->basic_consume('resize-picture', $consumer_tag, false, false, false, false, $consumer); while(count($channel->callbacks)) { $channel->wait(); }
Consumer Code $consumer = function($msg){ $meta = json_decode($msg->body, true); resize_picture($meta['image_id'], $meta['image_path']); $msg->delivery_info['channel']-> basic_ack($msg->delivery_info['delivery_tag']); };
Consumer Code $consumer = function($msg){ $meta = json_decode($msg->body, true); resize_picture($meta['image_id'], $meta['image_path']); $msg->delivery_info['channel']-> basic_ack($msg->delivery_info['delivery_tag']); };
Consumer Code $consumer = function($msg){ $meta = json_decode($msg->body, true); resize_picture($meta['image_id'], $meta['image_path']); $msg->delivery_info['channel']-> basic_ack($msg->delivery_info['delivery_tag']); };
Consumer Code $consumer = function($msg){ $meta = json_decode($msg->body, true); resize_picture($meta['image_id'], $meta['image_path']); $msg->delivery_info['channel']-> basic_ack($msg->delivery_info['delivery_tag']); };
Consumer Code $consumer = function($msg){ $meta = json_decode($msg->body, true); resize_picture($meta['image_id'], $meta['image_path']); $msg->delivery_info['channel']-> basic_ack($msg->delivery_info['delivery_tag']); };
Scenario Distributed Logging
Requirements
Requirements Several Web Servers
Requirements Several Web Servers Logic Separated by Module/Action
Requirements Several Web Servers Logic Separated by Module/Action Several Log Levels:
Requirements Several Web Servers Logic Separated by Module/Action Several Log Levels: Info, Warning, Error
Requirements Several Web Servers Logic Separated by Module/Action Several Log Levels: Info, Warning, Error Add/Remove log listeners at will
Design
Design
Design
Design
Design
Publisher Code $channel->exchange_declare('logs', 'topic', false, true, false); $msg = new AMQPMessage('some log message', array('content_type' => 'text/plain')); $channel->basic_publish($msg, 'logs', 'server1.user.profile.info');
Publisher Code $channel->exchange_declare('logs', 'topic', false, true, false); $msg = new AMQPMessage('some log message', array('content_type' => 'text/plain')); $channel->basic_publish($msg, 'logs', server1.user.profile.info');
Publisher Code $channel->exchange_declare('logs', 'topic', false, true, false); $msg = new AMQPMessage('some log message', array('content_type' => 'text/plain')); $channel->basic_publish($msg, 'logs', server1.user.profile.info');
Publisher Code $channel->exchange_declare('logs', 'topic', false, true, false); $msg = new AMQPMessage('some log message', array('content_type' => 'text/plain')); $channel->basic_publish($msg, 'logs', server1.user.profile.info');
Consumer Code Get messages sent by host: server1
Consumer Code $channel->exchange_declare('logs', 'topic', false, true, false); $channel->queue_declare('server1-logs', false, true, false, false); $channel->queue_bind('server1-logs', 'logs', 'server1.#');
Consumer Code $channel->exchange_declare('logs', 'topic', false, true, false); $channel->queue_declare('server1-logs', false, true, false, false); $channel->queue_bind('server1-logs', 'logs', 'server1.#');
Consumer Code $channel->exchange_declare('logs', 'topic', false, true, false); $channel->queue_declare('server1-logs', false, true, false, false); $channel->queue_bind('server1-logs', 'logs', 'server1.#');
Consumer Code $channel->exchange_declare('logs', 'topic', false, true, false); $channel->queue_declare('server1-logs', false, true, false, false); $channel->queue_bind('server1-logs', 'logs', 'server1.#');
Consumer Code Get all error messages
Consumer Code $channel->exchange_declare('logs', 'topic', false, true, false); $channel->queue_declare('error-logs', false, true, false, false); $channel->queue_bind('error-logs', 'logs', '#.error');
Consumer Code $channel->exchange_declare('logs', 'topic', false, true, false); $channel->queue_declare('error-logs', false, true, false, false); $channel->queue_bind('error-logs', 'logs', '#.error');
Consumer Code $channel->exchange_declare('logs', 'topic', false, true, false); $channel->queue_declare('error-logs', false, true, false, false); $channel->queue_bind('error-logs', 'logs', '#.error');
Consumer Code $channel->exchange_declare('logs', 'topic', false, true, false); $channel->queue_declare('error-logs', false, true, false, false); $channel->queue_bind('error-logs', 'logs', '#.error');
Why RabbitMQ?
RabbitMQ Enterprise Messaging System Open Source MPL Written in Erlang/OTP Commercial Support
Features Reliable and High Scalable Easy To install Easy To Cluster Runs on: Windows, Solaris, Linux, OSX AMQP 0.8-0.9.1
Client Libraries Java.NET/C# Erlang Ruby, Python, PHP, Perl, AS3, Lisp, Scala, Clojure, Haskell
Docs/Support http://www.rabbitmq.com/documentation.html http://dev.rabbitmq.com/wiki/ #rabbitmq at irc.freenode.net http://www.rabbitmq.com/email-archive.html
One Setup for HA
Conclusion
Flexibility Conclusion
Conclusion Flexibility Scalability
Conclusion Flexibility Scalability Interoperability
Conclusion Flexibility Scalability Interoperability Reduce Ops
Questions?
Thanks! Álvaro Videla http://twitter.com/old_sound http://github.com/videlalvaro http://github.com/tnc http://www.slideshare.net/old_sound